[LTP] [PATCH 3/4] include/Makefile: Fix cleaning targets

[Petr Vorel]

Hi Ricardo,

> Add ac-clean target as dependency of ac-maintainer-clean and add missing
> files to the removal list. This way the project top level Makefile cleaning
> targets can make use of it.

> Cc: Andrea Cervesato <andrea.cervesato@suse.com>
> Fixes: 817d8095fbfe ("Rename linux_syscall_numbers.h to lapi/syscalls.h")

I did not get how this commit broke the functionality.

Change LGTM.

Reviewed-by: Petr Vorel <pvorel@suse.cz>